Friction shock absorber for suspending vehicles



g 4, 1931- R. MASQUELIER 1,817,088

FRICTION SHOCK ABSORBER FOR SUSPENDING VEHICLES Filed Aug. 31/1929 2 Sheets-Shea 1 71 d f I J/ g lY vf/y TOR: ROGER NHSQUtZ/fR QTTORYVE 7s.

Aug. 4, 1931.

7 R. MASQUELIER FRICTION SHOCK ABSORBER FOR SUSPENDING VEHICLES Filed Aug. 31, 1929 2 Sheets-Sheet 2 Patented Aug. 4, 1931 MASQUELIER, O1 TIRLEMONT, BELGIUM FRICTION SHOCK ABSZILBER Application filed August 31, 1925, Serial No.

This invention relates to a shock absorber for vehicles of the kind in which an eccentric, taking part in the displacements of the axle with respect to the chassis produces at first on a friction band a friction which increases gradually, during the first portion of the rotation of the eccentric following a relative displacement of the frame and of the axle an then a friction which remains constant during the rest of the stroke.

It has for its object to allow this braking in both directions to be variable and of unequal and variable amount and to eliminate any long and difficult machining of the parts.

With this object in view the invention essentially consists in the special arrangements and combinations of parts hereinafter fully described and pointed out in the appended claims.

On the annexed drawings:

F 1 is a transverse section of a shock absorber, taken along the line 1-1 of Fig. 2.

Fig. 2 is a sectional view taken on the line II-II of Fig. 1.

Fig. 3 is a side elevation, partly broken away, of a modified construction of shock absorber, with the cover plate removed there from.

Fig. 4 is a sectional view taken approximately on the line IVIV of Fig. 3.

I As shown in e igs. 1 and 2, in the preferred construction, the apparatus comprises a housing or box 1 forming lugs 2 provided with holes 3 for securing the box to the axle of the The box is closed at the back, by a co ver-plate f and has at the front an opening- 5 in which passes a journal 6 which is inal with an eccentric 7 and ends in a e portion 8 on which is mounted the .r 9 connected to the chassis of the vehicle. this example, the eccentric 7 has in its side r cess 10 used for centering it upon a boss "1 of the ester-plate 4. Inside the box 1 is giac d a friction band 12 housed inside a brake band 13.

The eccentric 7 is constructed in such a way as to have a circular surface 14 which comes in contact with a portion (for example one half) of the internal periphery of the friction band 13 while it acts upon the other por- FOR SUSPENDING VEHICLES 389,642, and in Belgium September 5, 1928.

tion of the latter by means of a single cam 15 the internal surface of which is continuous, that is to say is not provided with any notch co-operating with any projecting part of the eccentric. In this construction, in order to limit the expansive ZlCLlOll of the eccentric 7 on the cam 15 when it rotates in the direction of the arrow (Fig. 2) a space 16 is left free between the flat faces 17 of the circular portion of the eccentric and the flat face is of the cam 15. Besides, the flatsurfaces of the eccentric coming in contact with the flat surfaces of the cam are provided with a recess 19 in which is placed an elastic material 20 which is always in contact with the fiat face of the cam. The brake band is provided at one of its ends with two lugs 21 on one of which a spring 22 acts, the compression of which can be adjusted by a nut 23. As will be easily understood, when the box 1 is fixed to the axle of the vehicle by means of bolts passing through the holes 3, and when the lever 9 is fixed to the chassis, if the axle tends to come nearer the latter and if the spring 22 is adjusted so that it is tightened as far as possible, the eccentric 7, when it turns in the direction opposite to that of the arrow 24, exerts, in the example shown, a braking action upon one half of the friction band 12 by means of the circular surface 1 1, while it is without action on the cam 15.

If the suspension of the vehicle tends to rebound, the lever 9 as it rises, causes rotation of the eccentric in the direction indicated by the arrow 24. Owing to this, the working surface of the eccentric exerts a braking action upon the corresponding half of the friction band by means of its circular surface, but it acts also by its eccentric portion upon the cam 15 which comes in contact with the other half of the internal periphery of the friction band, which causes a progressive braking action upon this portion of the band. This progressive braking action is, however, limited owing to the fact that, after a certain displacement of the eccentric 7 in the direction of the arrow 2- the flat faces 17 of the eccentric come in contact with the flat face 18 of the cam and cause the latter to participate in the circular motion thereby producstrength of the friction, a'spring 22, theconi free space 26 is left.

'facilit T but besides it also roduces a friction,and therefore a braking action, whatever may be the direction of the relative di placement of the chassis and of the axle.

Instead of using for controlling the pression of which can be adjustedby a nut, a rubber band'25 may be utilized (Figs. 3 and 4) concentrically arranged with respec to the friction band 12 and coming into contact with the external aerinher Y of the latter. a i .l

Between the ends of said rubber band, a In this case the brake band can beomitted; the rubber band 25 is however surrounded by a casing which forms lugs 28 and 29 con rested by a bolt 30 provided with a nut 31. One of the lugs, for

instance the lug 29, is extended to form a lever 32 for connection with the axle of the vehicle, by any suitable'ineans.

It will be understood that the distance be :t {@611 the lugs 28 and 29 can beinodiiied at will by means of the-nut 81 and that cons-equently'the tension of the rubber band 25 can also be varied, the ends of which can come nearer'to one another, owing to the presence of the free space 26. Moreover the unit formed by the eccentric the cam 15, the friction band 12, the rubber band 25 and the casing 2;, is covered laterally by circular plates 34 connected by means .of screws 35 to the eccentric 7. I 1 V Said plates 34 areprovided with levers 36 forming prolongations' and connected together and also tothe chassis by any suitable means. x What I claim is:

1. Ina shock absorber for vehicles, in combination a circular housing,-a circular friction band inside the housing, an eccentric ar-' ranged inside the said friction band andpro- Vided with circular sur'facecoming into contact with s-ubstantially one half of the internal periphery of thefriction band, a cam, the in- .ternal surface of which is continuous and ar- Y ranged'between the eccentric and the remaining portion, of the friction band, means whereby the said eccentric vis rotate and means whereby the cam is rotated during only a part of the rotation of the eccentric. 2. In a shock absorber for'vehicles, in combination, a circular housing, a circular .fric

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whereby the said eccentric is rotated, means whereby the cam is rotated duringonly a part of the rotation of the eccentric and means whereby the diameter of the said housing is adapted to be adjusted. a

3. In a shock absorber for vehicles, in combination, a circularhousing, a circular friction band. inside the housing, an eccentric arranged inside the'said friction band and provided with a circular surface coming into contact with substantially one half of the internal periphery of the friction band, a cam, the internal surface of which is continuous and arranged between the eccentric and the re maining portion of the friction band, means whereby the, eccentric is rotated, a space being left free between the flat facesofrthe' cam and flat faces formed-at the ends of thecircular part of the eccentric whereby the cam is rotated during only a part ofthe rotation of the eccentric andineans whereby the diameter of the housingiis adapted-to be adjusted.

l. In a shock absorber forvehicles in corn binati-on circular housing a circular friction ba dc ranged-inside the said friction band and provided, with a circular surface-coming into contact with substantialy :oneha-lfof the internal periphery of the friction b and, a cam,

the'internalperipheryof which is continuv .ous arranged between theeccentric :and the remainin portion of the friction band, ineans wherebythe eccentricis rotated, means whereby the cam is rotatedduring a part-of the rotation of theieccentric an elastic bandnature. a

ROGERMASQUELIER.

tion band inside the housing, an eccentric arranged inside the said friction band and provided with a circular surface coming into contact with substantially one halfof the internal periphery'of the friction band, a cam, 1

the internal surface of which is continuousv and arranged between'the eccentric and the remaining portion of the friction band,1neans the housing, an eccentric ar- 

